地基验槽重点观察的内容有（）。 基坑周边是否设置排水沟。 地质情况是否与勘察报告相符。 是否有旧建筑基础。 基槽开挖方法是否先进合理。 是否有浅埋坑穴、古井。
What are three purposes of the RMAN “FROM” clause?（） to support PUSH-based active database duplication。 to support synchronization of a standby database with the primary database in a Data environment。 To support PULL-based active database duplication。 To support file restores over the network in a Data Guard environment。 To support file recovery over the network in a Data Guard environment。
You work as a database administrator at Certkiller .com. Your database is open and running in ARCHIVELOGmode. You take RMANfull backups every Sunday night. On Monday morning， while querying the user1.employeestable， you receive the following error message： 01578： ORACLE data block corrupted （file # 5， block # 51） ORA-01110： data file 5：’/u01/app/oracle/oradata/orcl/example01.dbf’ You need to rectify the corruption while ensuring the following： The data file should remain online. The mean time to recover （MTTR） should be minimal. You are not using a backup control file and all the archived logs are accessible. Which option would you choose？（） flash back the corrupted blocks。 use the DBMS_REPAIR package。 use the RMAN TSPITR command。 use the RMAN BLOCKRECOVER command。 use the RESTORE DATABASE and RECOVER DATABASE commands。 investigate the time at which the corruption occurred and perform a point-in-time recovery。
现阶段我国工程造价管理信息化的主要工作可以从以下几方面入手：（）。 制定和完善工程造价信息化建设标准体系。 进行造价管理市场整合，建立统一的软件平台。 制定工程造价管理信息化的总体规划。 建立工程造价管理信息基础网络平台。
You are working on an Oracle Database 10g database. You enabled the Flashback Database feature. Which two statements regarding flashback logs are true？ （） Flashback logs are not archived.。 Flashback logs are maintained in redo log files.。 Flashback logs are maintained in the Flash Recovery Area.。 Flashback logs are used to maintain Flashback Database related errors.。 Flashback logs need to be cleared manually after you disable Flashback Database.。
在安装机械密封过程中，不允许用工具（）密封元件以防止密封件被损坏。
